Lighthousedle
Puzzle #30 was Alcatraz Island Light.
Alcatraz Island Lighthouse is a lighthouse—the first one built on the U.S. West Coast—located on Alcatraz Island in California's San Francisco Bay. It is located at the southern end of the island near the entrance to the prison. The first light house on the island was completed in 1854, and served the bay during its time as a Citadel and military prison.
Read about it on Wikipedia →
What the record says
Puzzle 30 ran on 8 Aug 2026 and the answer was Alcatraz Island Light, played with 6 guesses against 8 columns. On the record: Country - United States; Continent - North America; Height - 20-40m; Material - concrete; Heritage - listed. The numbers: Built - 1850; Focal height - 65 m; Range - 24 nmi.
Lighthousedle builds its record from Wikidata - CC0 1.0. The description above comes from the same place the game credits on every reveal: English Wikipedia summary excerpt, CC BY-SA 4.0. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Country
- United States
- Continent
- North America
- Built
- 1850
- Height
- 20-40m
- Material
- concrete
- Heritage
- listed
- Focal height
- 65 m
- Range
- 24 nmi